Abbott Plastics - Typical Properties of Acetal & Delrin

Property	Test Method	Acetal Copolymer	Delrin®	Delrin® AF
Mechanical Properties
Specific Gravity	ASTM D792	1.41	1.42	1.50
Density (lb/in³)	ASTM D792	0.0509	0.0515	-
Tensile Strength, Break (p.s.i.)	ASTM D638	9,800	10,000	7,600
Elongation At Break (%)	ASTM D638	75	75	22
Tensile Modulus (p.s.i.)	ASTM D638	430,000	450,000	420,000
Rockwell Hardness	ASTM D785	M80	R120 / M94	R118 / M78
Impact Strength 73°F Notched (ft-lbs/in)	ASTM D256	1.0	2.3	1.2
Flexural Strength (p.s.i.)	ASTM D790	13,000	14,300	10,500
Flexural Modulus (p.s.i.)	ASTM D790	370,000	420,000	340,000
Coefficient Of Friction (Dynamic)	40psi 50fpm	0.21	0.20	0.16
Thermal Properties
Melting Point (°F)	-	330	347	347
Heat Deflection at 66psi (°F)	ASTM D648	316	336	334
Heat Deflection at 264psi (°F)	ASTM D648	230	257	244
Max Service Temperature Short Term (°F)	-	285	300	300
Max Service Temperature Long Term (°F)	-	195	185	185
Thermal Conductivity (BTU-in/ft²-hr-°F)	ASTM C177	1.60	2.60	-
Coefficient of Linear Thermal Expansion (in/in/°F)	ASTM D696	0.000061	0.000068	0.000068
Flammability	UL94	HB	HB	HB
Electrical Properties
Dielectric Constant At 60HZ	ASTM D150	3.8	3.7	3.1
Dissipation Factor At 60HZ	ASTM D150	0.003	0.005	0.009
Dielectric Strength (V/mil)	ASTM D149	500	500	400
Water Absorption Rates
Water Absorption -24 hrs.(%)	ASTM D570	0.20	0.25	0.20
Water Absorption -Saturation (%)	ASTM D570	0.80	0.90	0.72

NOTE: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets.